iphone - 如何检测iphone中的某个按钮是否被点击

Question

我有一个 iPhone 应用程序，我希望在移动到下一个屏幕之前，它应该单击我拥有的 4 个或 5 个按钮中的任何一个，如果用户没有单击任何按钮，那么它可能不会移动到下一个屏幕

第一个按钮，用户必须单击其中任何一个按钮才能移至下一个，否则不能

-(IBAction)locationOneButtonAction{

    UIImage *buttonImage = [UIImage imageNamed:@"radiogreen.png"];  
    UIImage *buttonImageOne=[UIImage imageNamed:@"radiowhite.png"];

    [locationOneButton setImage:buttonImage forState:UIControlStateNormal];
    [locationOneButton setImage:buttonImage forState:UIControlStateNormal];

    [locationThreeButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationTwoButton  setImage:buttonImageOne forState:UIControlStateNormal];

    [locationFourButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationFiveButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationSixButton  setImage:buttonImageOne forState:UIControlStateNormal];

    resturantLocation=@"Common Man - Bedford, MA";
}


-(IBAction)locationTwoButtonAction{

    UIImage *buttonImage = [UIImage imageNamed:@"radiogreen.png"];
    UIImage *buttonImageOne=[UIImage imageNamed:@"radiowhite.png"];

    [locationOneButton setImage:buttonImageOne forState:UIControlStateNormal];
    [locationThreeButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationTwoButton  setImage:buttonImage forState:UIControlStateNormal];
    [locationFourButton  setImage:buttonImageOne forState:UIControlStateNormal];

    [locationFiveButton  setImage:buttonImageOne forState:UIControlStateNormal];
    [locationSixButton  setImage:buttonImageOne forState:UIControlStateNormal];

    resturantLocation=@"Common Man - Arlingtion, NY";
}

“下一步”按钮移至下一个屏幕

-(IBAction)nextButton{

    FoodViewController*targetController=[[FoodViewController alloc]init];
    targetController.resturantLocation=resturantLocation;

    [self.navigationController pushViewController:targetController animated:YES];
}

Answer 1

最简单的方法是获得一个标志.. 在 .h 文件中使用

BOOL _flag;

在viewWillAppear中将其设置为_flag = NO;

在进入下一个屏幕之前必须单击的每个按钮的操作上，将其设置为YES，如下所示:

-(IBAction)locationOneButtonAction{
    // your stuff
    _flag = YES;
}
-(IBAction)locationTwoButtonAction{
    // your stuff
    _flag = YES;
}

在您的下一个按钮中单击使用它，就像

-(IBAction)nextButton{

    if(_flag) {
        FoodViewController*targetController=[[FoodViewController alloc]init];
        targetController.resturantLocation=resturantLocation;
        [self.navigationController pushViewController:targetController animated:YES];
    }
}

希望这有帮助:)如果您正在寻找其他东西，请告诉我